Blind-slat lock.



PATENTED FEB. 3; 1903.

3 n E H m w iN m M M .E- MHMHIILH 5 J.i a N E a n a I a V N A j m z J. W. CLARK. BLIND SLAT LOOK.

APPLICATION FILED NOV. 22, 1901.

no MODEL.

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ED STATES JAMES W. CLARK, OF PAWTUCKET, RHODE ISLAND.

BLIND-SLAT LOCK.

SPECIFICATION forming part of Letters Patent No. 719,648, dated February 3, 1903. Application filed November 22, 1901. Serial No. 88,212. (No model.)

To all whom, it may concern:

Be it known that I, JAMES W. CLARK, a citizen of the United States, residing at Pawtuoket, in the county of Providence and State of Rhode Island, have invented a new and useful Improvement in Blind-Slat Looks, of which the following is a specification.

This invention has reference to looks for locking the slats of blinds after adjustment by hand and holding them securely in the locked position.

One object of this invention is to so construct a blind-slat lock that it will lock the slat in any position from open to closed.

Another object of this invention is to construct a blind-slat look so that it is reversible and can be used for a right or left hand lock.

The invention consists in the peculiar and novel construction whereby a spring in the lock holds the locking-bolt in the locked position and is unlocked when pressure is applied to the push-button on the locking-bolt, as will be more fully set forth hereinafter.

Figure 1 is a side View of a blind with the center broken away, showing my improved lock on the left in full lines and on the right in broken lines. Fig. 2 is a sectional view on line w w, Fig. 1, showing the slats closed in full lines and open in broken lines. Fig. 3 is an inside view of the lock detached from the blind, showing the locking mechanism. Fig. 4 is a cross-sectional view of the look on line a; so of Fig. 3. Fig. 5 is a sectional view through the center of the lock on line 3 y of Fig. 3.

In the drawings, aindicates a blind; a, the slats; a the slat-stick,made in the usual way; 6, the frame of the lock, stamped from sheet metal and shaped to form the front plate I) with the opening b for the looking-bolt b and the screw-holes b to fasten the lock to the blind, the back plate to cover the opening in the blind-frame made to insert the look, the shaft 6 having the bearing 19 in the lock-frame, the square shank b on the shaft to hold the locking-gear b the slat-holder b riveted to the outer end of the shaft 19 formed to clamp the end of the slat on both sides and fastened by screws or other means to the slat, the locking-bolt o having the push-button b on its outer end, the slot b in the locking-bolt to form a guide on the shaft 11 to allow for movement of thebolt, the bent end 19 shaped to engage with the lockinggear b when in the locked position, the spring I), supported on the look-frame by the stud 19 one end of the spring entering a slot in the front plate I) and the other end bearing againsta pin b on the locking-bolt Z1 to hold the locking-bolt in engagement with the locking-gear, and the tapered pin b" on the inner end of the shaft 5 to hold the operative parts in their relative positions. To unlock, I push the button I), forcing the locking-bolt b inward against the spring 11 releasing the locking-gear 6 The slats can then be adjusted into any position required and locked by releasing the push-button. The bent end 12 of the locking-bolt then comes into contact with and between the teeth of the locking-gear b on the shaft b carrying the slat-holder b and looking the slats in the required position.

I do not wish to confine myself to this exact construction, as the slat-holder 12 could be closed at the top and bottom, forming a pocket for the end of the slat, thus securing the slat to the holder without screws or rivets.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. In a blind-slat lock, in combination with the lock-frame b, the slat-holder b formed to 'hold the end of the slat, the shaft 13 secured to the slat-holder and formed with the square portion b the locking-gear 12 secured to the squared portion of the shaft 19?, the locking bolt b one end of which is formed to engage with the locking-gear b the spring I) for operating the locking-bolt, and means such as the pin 1) for holding all the parts in their relative positions in the frame b, as described.

2. In a blind-slat lock, in combination with the lock-frame b, the front plate I) having the opening b for the bolt Z2 and the screw-holes b to fasten the lock to the blind-frame, the back plate I) to cover the opening made in the blind-frame toinsert the lock, the shaft 17 having a bearing 19 in the lock-frame, the square shank b on the shaft to hold the locking-gear b the slat-holder 11 formed to securely hold the slat a, the locking-bolt b with the push-button b formed on its outer end, and having the slot 72 to form a guide on the shaft b and to allow for movement of the bolt 12 the bent end I) on the bolt to en- 5 gage with the locking-gear b the spring I) supported on the look-frame by the stud 19 one end of the spring entering a slot in the front plate I), the other end bearing against the pin 1), and the tapered pin b" on the in- 10 ner end of the shaft 19 to hold the operative parts in their relative positions, substantially as described.

In testimony whereof I have signed my nameto this specification in the presence of two subscribing witnesses.

JAMES W. CLARK.

' Witnesses:

ADA E. HAGERTY, J. A. MILLER, Jr. 

